In a nutshell, in addition to being a ANT+ and Bluetooth Low Energy (BTLE) heart rate monitor, it also acts as a bridge between ANT+ devices that don’t offer BTLE functionality. In my original review of the Viiva, I complained because few software offerings provided support for it and the data is sent to apps wasn’t accurate.

Well, I need to revise my opinion of the Viiva … it has gained adoption and now appears to be quite useful.

Those who use training programs (such as Zwift) with Apple TV have already learned that the Apple TV only supports 3 total BTLE devices connected. One of those devices slots is already taken by the remote control. That leaves only 2 more slots.